/Engine/Source/Runtime/Engine/Classes/EdGraph/EdGraphNode.h
Create a new pin on this node using the supplied info, and return the new pin
[UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * CreatePin ( EEdGraphPinDirection Dir, const [FName](API\Runtime\Core\UObject\FName) PinCategory, const [FName](API\Runtime\Core\UObject\FName) PinName, const [FCreatePinParams](API\Runtime\Engine\EdGraph\UEdGraphNode\FCreatePinParams) & PinParams )